1. What is Specific Capacity?

Specific Capacity is a measure of the productivity of a well, representing the discharge per unit drawdown. It indicates how much water a well can yield for a given amount of drawdown.

2. How Does the Calculator Work?

The calculator uses the Specific Capacity formula:

Where:

• \( Discharge \) — Rate of flow of water (m³/s)
• \( Cross-Sectional\ Area \) — Area of the well cross-section (m²)
• \( Constant\ Depression\ Head \) — Constant depression head in the well (m)

Explanation: The formula calculates the specific capacity by dividing the discharge by the product of cross-sectional area and constant depression head.

3. Importance of Specific Capacity Calculation

Details: Specific capacity is crucial for evaluating well performance, designing well systems, and determining the efficiency of water extraction from aquifers.

4. Using the Calculator

Tips: Enter discharge in m³/s, cross-sectional area in m², and constant depression head in m. All values must be positive and non-zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of specific capacity?
A: Specific capacity helps in assessing the yield efficiency of a well and is used to compare the performance of different wells.

Q2: How does cross-sectional area affect specific capacity?
A: Larger cross-sectional areas typically result in lower specific capacity values for the same discharge and depression head.

Q3: What units are used for specific capacity?
A: Specific capacity is typically measured in meters per second (m/s) in the SI system.

Q4: Can specific capacity change over time?
A: Yes, specific capacity can decrease due to well clogging, reduced aquifer permeability, or other factors affecting well performance.

Q5: How is constant depression head determined?
A: Constant depression head is typically measured during pumping tests where the water level drawdown is stabilized at a constant rate.